The detailed National Variation Agreement template (shorter-form contract) is used to effect the NHS Standard Contract (January 2018 edition) National Variation for 2017-19, in accordance with Option 3 in the Guidance on National Variations to existing 2015/16, 2016/17 and 2017-19 (November 2016 edition) full length contracts, and to 2016/17 and 2017-19 (November 2016 edition) shorter-form contracts.